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Antenna Enhanced infrared Photoinduced Force Imaging in Aqueous Environment with Super-Resolution and Hypersensitivity

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CCS Chemistry 2022年第8期4卷 2738-2747页

作者： Jian Li Jie Pang Zhen-dong Yan Junghoon Jahng Jin Li William Morrison Jing Liang Qing-Ying Zhang Xing-Hua Xia State Key Laboratory of Analytical Chemistry for Life Science School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023 College of Science Nanjing Forestry UniversityNanjing 210037 Center for Nanocharacterization Korea Research Institute of Standards and ScienceDaejeon 34113 Molecular Vista Inc. San JoseCA 95119

Tip-enhanced infrared(IR)spectra and imaging have been widely used in cutting-edge studies for the in-depth understanding of the composition,structure,and function of interfaces at the ***,molecular monolayer sensitivity has only been demonstrated at solid/gas *** an aqueous environment,reduced sensitivity limits the practical applications of tip-enhanced IR ***,we present an approach to hypersensitive nanoscale IR spectra and imaging in an aqueous environment with a combination of photoinduced force(PiF)microscopy and resonant antennas.

关键词： photoinduced force microscopy aqueous environment infrared nanospectroscopy near-field imaging antenna

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Nanoscale image of the drug/metal mono-layer interaction:Tapping A FM-IR investigations

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Nano Research 2020年第4期13卷 1020-1028页

作者： Natalia Piergies Alexandre Dazzi Ariane Deniset-Besseau Jeremie Mathurin Magdalena Ocwieja Czeslawa Paluszkiewicz Wojciech M.Kwiatek Institute of Nuclear Physics Polish Academy of SciencesPL-31342 KrakowPoland Laboratoire de Chimie Physique(LCP) CNRS UMR 8000Univ.of Paris-SudUniversite Paris-Saclay91405 OrsayFrance Jerzy Haber Institute of Catalysis and Surface Chemistry Polish Academy of Sciences Niezapominajek 8PL-30239 KrakowPoland

The application of metal nanoparticles as an efficient drug delivery system is one of the directions of cancer therapy ***,this strategy requires precise information about how the drug interacts with the applied *** this study,atomic force microscopy combined with infrared spectroscopy(AFM-IR)was used for the first time to investigate the erlotinib adsorption structure on two different types of 15 nm metal nanoparticle mono-layers,namely,silver nanoparticle(AgNP)and gold nanoparticle(AuNP)*** the metal nanoparticles are loosely bound samples,only the tapping AFM-IR mode is suitable for the collection of IR maps and spectra for such a *** obtained results indicated the relevance of the AFM-IR technique for characterizing drug interactions with a metal mono-layer *** investigated drug interacts with the AgNPs mainly through phenyl rings and methoxy moieties,while quinazoline,amino,and ethoxy moieties appear to be farther from the *** the AuNPs,the interaction occurs through both the phenyl ring and the quinazoline ***,the aliphatic groups of erlotinib directly participate in this *** novelty of the present work is also related to the use of the tapping AFM-IR mode to study metal NP mono-layers with a drug adsorbed on *** collected IR maps for the most enhanced erlotinib bands show specific areas with very high signal *** connection between these areas and the"hot spots"typical for the surface plasmon resonance phenomenon of metals is considered.

关键词： metal nanoparticle mono-layer drug's adsorption infrared nanospectroscopy atomic force microscopy erlotinib

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